What cancer kills the most in the US?

Colon Cancer :

 Colorectal cancer is the third leading cause of death among the various cancers in the United States and appears as a tumor in the large intestine, which represents the part responsible for extracting water and salt from solid waste in the human body before it travels through the rectum and exits the hole The doctors recommend people over the age of 50 years to perform a periodic examination to detect this type of cancer, as the symptoms may appear only in the advanced stages of the disease, and may suffer many people from colorectal cancer al cancer) together.

Causes and risk factors for colon cancer :

In fact, doctors have not been able to determine the exact cause of the occurrence or development of this type of cancer, but there are many factors that increase the risk of colon cancer, including the following:

• There is a family history of colon cancer. The risk of this type of cancer doubles to two or three times that of a first-degree relative with colon cancer.
• Breast, ovarian, or uterine cancer, whether earlier or present.
• Ulcerative colitis or Crohn's disease.
•  Obesity.
•  Smoking.
•  Take certain medications.
•  Estrogen replacement therapy prescribed for postmenopausal women contributes to a one-third reduction in the risk of colorectal cancer.
• Although there is not enough evidence of the effect of diet on reducing or increasing the risk of colon cancer, it is believed that a diet that contains large amounts of fiber, such as in vegetables and fruits, and low amounts of fat has the role of prevention of Colon cancer, and eating red meat or processed meat products has a role in increasing.
• The risk of colon cancer increases in people over the age of 60 years.
• Ethnicity.
• The risk of colorectal cancer increases among people of Eastern European origin as well as among African Americans.
• Infection with certain genetic diseases, especially Familial Adenomatous Polyposis.

Symptoms of colon cancer :

 The symptoms of colorectal cancer do not appear in the early stages of the disease. Symptoms may vary depending on the part of the colon in which the tumor appears. In fact, there are no specific signs or symptoms of colon cancer. The symptoms may indicate other problems. Which may accompany colorectal cancer are as follows:

•  Anal bleeding or the appearance of blood in the stool.

•  The appearance of stool in dark color.

•  Changes in bowel habits.

•  Change in stool strength.

•  Anemia.

•  Constipation or feeling of not emptying the contents of the entire intestine.

•  Diarrhea.

•  Abdominal disorders, appearing in the form of pain, discomfort, colic, or bloating.

•  Weight loss.

•  Anorexia.

•  Feeling tired or weak.

•  Nausea or vomiting.

•  hard breathing.

Diagnosis of colon cancer :

A series of tests are carried out to diagnose colon cancer and determine the stage of the disease.
CT scan:

• This scan uses X-rays, which are highly sensitive to identify new or recurrent tumors within the body.

• Positron Emission Tomography (Positron Emission Tomography): This imaging relies on the use of specific types of pigments, which can detect most of the cancer cells that spread outside the colon.

• Cancer antigen assay (CEA): The high level of cancerous antigen in the blood indicates cancerous tumors. This is done in conjunction with other tests, as it can not be relied upon alone in diagnosis. 

• Magnetic Resonance Imaging This imaging is done to obtain images of organs and structures within the body. It also helps to determine if the tumor has spread through the rectal wall and has reached the surrounding structures.

• Ultrasound imaging by ultrasound: This examination is carried out to detect the spread of tumors to the liver, gall bladder, pancreas, or any other member of the abdomen. 

Treatment of colorectal cancer :

After the diagnosis of the patient's cancer of the colon, the appropriate treatment plan is developed based on the stage of cancer. It should be noted that the precise stage of colon cancer is only after the patient is often subjected to surgery.
The following are the treatments used to control cancer Colon:

• Surgical treatment: Determines the appropriate surgical method for the patient by the doctor depending on his condition, as the patient undergo surgery to remove the tumor and lymph nodes, this enables the full treatment of the disease. 

• Other treatments: The patient may undergo colorectal cancer for chemotherapy before or after surgery, and may resort to radiotherapy in some cases, but this is rare.